Add changelog section (#16176)

Author: carmocca

src/lightning_fabric/CHANGELOG.md

@@ -4,6 +4,20 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
+## [fabricLaunchVersion] - 202Y-MM-DD
+
+
+### Added
+
+- Added basic support for LightningModules ([#16048](https://github.com/Lightning-AI/lightning/issues/16048))
+
+
+- Added support for managing callbacks via `Fabric(callbacks=...)` and emitting events through `Fabric.call()` ([#16074](https://github.com/Lightning-AI/lightning/issues/16074))
+
+### Changed
+
+- Renamed the class `LightningLite` to `Fabric` ([#15932](https://github.com/Lightning-AI/lightning/issues/15932), [#15938](https://github.com/Lightning-AI/lightning/issues/15938))
+
 
 ## [fabricLaunchVersion] - 202Y-MM-DD
 

src/pytorch_lightning/CHANGELOG.md

@@ -5,6 +5,22 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 
+## [fabricLaunchPLVersion] - 202Y-MM-DD
+
+
+### Removed
+
+- `nvidia/apex` removal ([#16149](https://github.com/Lightning-AI/lightning/pull/16149))
+  * Removed `pytorch_lightning.plugins.NativeMixedPrecisionPlugin` in favor of `pytorch_lightning.plugins.MixedPrecisionPlugin`
+  * Removed the `LightningModule.optimizer_step(using_native_amp=...)` argument
+  * Removed the `Trainer(amp_backend=...)` argument
+  * Removed the `Trainer.amp_backend` property
+  * Removed the `Trainer(amp_level=...)` argument
+  * Removed the `pytorch_lightning.plugins.ApexMixedPrecisionPlugin` class
+  * Removed the `pytorch_lightning.utilities.enums.AMPType` enum
+  * Removed the `DeepSpeedPrecisionPlugin(amp_type=..., amp_level=...)` arguments
+
+
 ## [unreleased] - 202Y-MM-DD
 
 ### Added